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Using proximity switches for speed control – we have seen customers use these techniques to understand and monitor speed of their equipment   Speed Rate A proximity switch can be used to measure the speed of a conveyor belt, pump, etc by putting a metal disc on a rotating shaft that runs at the speed you wish to measure.  The metal disc should have holes punched in it large enough to allow the proximity switch to switch on and off.  A PLC will then take this input (may hav ...